Duplicating Layers March 7, 2016. Posted in: Tip Of The Day. One way to duplicate layers is to hold Alt (Mac: Option) and click and drag on the layer thumbnail in the layer’s panel. You can release the mouse button anywhere on the layer’s panel to place the duplicate in between whatever layers you want. « Previous Photoshop Tip: | Next Photoshop Tip: » Get The Tip of The Day in Your Inbox! Sign-up for the PTC Newsletter to receive a weekly re-cap of the Tips of The Day. That way you'll never miss a tip. You'll also get instant access to the Subscriber Only Tutorials! Enter your email below to sign up! Your Email Address: You Can Also Get Daily Tips On Your Feed! Every Photoshop Tip of The Day is posted in our Facebook & Google Plus, Twitter, LinkedIn, and Pinterest pages.